I would like to flare the port on my 2 Pis, perhaps with a 1/2 or 3/8 inch round over bit on the router. If it matters, I am using 3/4" stock with appropriate compensation to keep the design cabinet volume. How would I change the port length to compensate for the flare? I do not want to change the Helmolzt frequency, but I would like to reduce the noise from a sharp transition at the mouth of the port. Thanks for any help you can provide.

Caddis PM